Sealing-cap for bottles.



'PATENTBD SEPT. 29, 1903.

y M. sEm-ER'L' SEALING GAP-POR BOTTLES A?PLIOATIOX FILED APR. 2h, 1803.

I0 IODBL.

UNITED STATES Patented September 29,` 1903.

PATENT QEEICE.

sEALING-CAP Fon BOTTLES.

SPECIFICATION forming' part of Letters Patent N 0. 739,932, datedSeptember 29, 1903.

Application iled April 29, 1903. Serial No. 154,792. (No model.)

To allwwm it may concern: i

Be it known that I, MAX SEIFFRRT, a subject of the German Emperor, and aresident of Leipzig, Germany, have invented certain new and usefulImprovements in Sealing-Caps for Bottles, of which the following is aspecification.

This invention relates to a sealing cap or closure for bottles; and itsobject is to do away with the drawbacks usual to devices of the samekind and furnish a bottle-seal wholly free of germs. In most cases theclosure or sealing of bottles is now accomplished by means of corkorindia-rubber. Both materials, however, have the drawback that theycannot be exposed to the temperatures necessary for a complete and suresterilization (300 Fahrenheit) without losing the qualities which renderthem suitable for attaining an inodorous or tasteless closure. At saidtemperature of 300 Fahrenheit both would be decomposed or dissolved,smell and taste of burning, and not be well applicable as a tightclosure. Besides this the shape of such materials as used for sealingbottles in form of plugs, plates, or rings renders it necessary for themto be touched by hand for the purpose of closing the vessels. Thus areinfection of such bodies is inavoidable even if they previously hadbeen subjected to a mostly insufficient chemical disinfection.

My sealing cap or closure for bottles con-V sists of tin-foil free oflead and of corresponding thickness which on its part opposing the 35bottle-opening is provided with an elastic re- This cover is composed ofN carragheen or agar, which in a three per cent.

Yarable cover.

to five per cent. watery solution, with onehalfft'o one per cent. ofchemically-pure glycmay be stiifened and dried. Thus leaves of tin-.foilare produced which on one side are covered by elastic agar relaxable incondensing steam or water. These leaves are cut into strips and wound inrolls inclosed in a packing of paper. As tin melts at 446 Fahrenheit,glycerin only at 554.0 Fahrenheit, these rolls can be sterilized in dryheat of 300 Fahrenheit. For making use of such strips I prefer toperforate them at suitable 5o distances in the form of a circle, so thatthe diameter of the circles corresponds to the necessary breadth of theseal. In the annexed drawings such a sealing-cap is represented.

Figure l is afront or top View, Fig. 2 a longitudinal section, and Fig.3 a cross-section, thereof. Y

lis the elastic metal strip provided at 2 with a covering of relaxableelastic material. The thickness of this metal disk l, which, as statedabove, preferably is composed of tinfoil free of lead, naturally is verydifferent in each case. It depends thereupon if duplicatures areadmissible on the seal, when the disk of tin-foil may be optionally thinor if the' closure has to be accomplished in such a manner that inconsequence of the elasticity of the material any duplicature has to beavoided and an equable removing or blocking of the material at theperiphery of the circular disks 3 takes place. In the latter case thethickness of the disk of tin-foil applied should not surpass a fixedmeasure.

Having now fully described my invention,

2. An aseptic sealing-cap for bottles consisting of a metal disk oftin-foil free of lead said disk being covered with a ilm consisting ofthree to five per cent. agar or caragheen and of one-half toone percent. pure glycerin, substantially as set forth.

3. An aseptic sealing-cap for bottles consisting of a circular metaldisk provided with a relaxable elastic covering, substantially as setforth.

4.. A blankfor forming aseptic sealing-caps for bottles, consisting of ametal strip provided with a relaxible elastic cover and containingperforations forming lines about portions of the blank, said portionscorresponding in size to the caps to be formed therefrom, substantiallyas described.

In testimony whereof I aiiix my signature in presence of two witnesses.

MAX SEIFFERT.

Witnesses:

MORRIS LIPMAN, f BERNHARD SEIFFERT.

